Generac Power Systems GUARDIAN 04137-0 - Manual (Page 19)

Section 4 — Troubleshooting
Guardian Liquid-cooled 8 kW Generators
TROUBLESHOOTING
4.1 TROUBLESHOOTING GUIDE
PROBLEM CAUSE CORRECTION
The engine will not crank. 1. Fuse blown
2. Loose, corroded or defective
battery cables
3. Defective starter contactor
4. Defective starter motor
5. Dead Battery
1. Replace fuse.
2. Tighten, clean or replace
as necessary.
3. *
4. *
5. Charge or replace battery.
The engine cranks but
will not start. 1. Out of fuel
2. ' Defective fuel solenoid (FS)
3. Open #14 wire from
engine control board
4. Dirty/Blocked air filter
5. Amto/Off/Manual Switch
in OFF position
1. Replenish fuel.
2. *
3. *
4. Clean or replace as required.
5. Reset to AUTO or IvLwMUAL.
The engine starts hard
and runs rough.
1. Air cleaner
plugged or damaged
2. Dlrty/Blocked air filter
1. Check, clea.n or replace air cleaner.
2. Clean or replace as required.
The engine starts, but then
shuts doLTO.
1. Engine oil level low
2. Defective low oil
pressure switch
3. Defective high temperature
switch
4. Defective control board
5. Low coolcmt level
6. Defective low coolant switch
7. Engine temperature high
8. Loss of AC sensing to
control boa.rd
1. Check oil and add oil as needed.
2 *
O .1.
o.
4. *
5. Check coolant level, repair leaks
and refill.
6. *
7. Check engine cooling airflow.
R ^
The Auto/Off/Manual switch
is set to OFF, but the engine
continues to run.
1. Defective switch
2. Defective control board
1. *
0
There is no AC output from
tlie generator.
1. Generator main line circuit
breaker open
2, Generator internal failure
1, Reset circuit breaker
to ON (or closed].
2. *
There is no transfer to
standby after utility
source failure.
1. Generator main line circuit
breaker open
2. Defective transfer svfitch coil
3. Defective transfer relay
4. Transfer relay circuit open
5. Defective control logic board
1. Reset circuit breaker
to ON (or closed).
2. *
3. *
4.
5. *
*Contact your nearest Generac/Guardian Authorized Dealer for assistance.
Generac* Power Systems, Inc. '1 *7